Method of making packing-rings



I, I. RICHTER.

METHOD OF MAKING PACKING RINGS. APPLICATION FILED DEC- 6. 1917.

1,316,463. PatentedSept. 16, 1919.

Jo J 72 6022?! UNITED STATES PATENT OFFICE.

JOHN J". RICHTER, 0F THIEF RIVER FALLS, MINNESOTA.

METHOD OF MAKING PACKING-RINGS.

Specification of Letters Patent.

Original application filed February 12, 1916, Serial No. 77,954. Dividedand this application filed December 6, 1917. Serial No. 205,859.

To all whom it may concern:

Be it known that I, JOHN J. RICHTER, a citizen of the United States,residing at Thief River Falls, in the county of Pennington and State ofMinnesota, have invented a new at all times automatically under workingconditions to which rings of this character are generallysubject. Thisapplication is a division of the subject matter of my companionapplication Serial Number 77,954, filed on the 12th day of February,1916, for packing rings, and allowed on the 9th day of November, 1917,the particular feature of novelty claimed in this application relatingto the production of a piston ring formed in a plurality of longitudinalparts welded together.

In the accompanying drawing forming part of this specification, Figure 1is a plan of my invention; Fig. 2 is a plan of a detail and Figs. 3 andat are side elevations of details.

In piston rings now in general use there is more or less leakage due tothe rings wearing away on their outer faces and the ends separating,thus permitting the fluid or gas under compression to leak through. Myinvention overcomes this objection by constructing the ring in aplurality of parts welded together, so that the two ends may be made tooverlap at any distance desired or not overlap when desired. In thismanner a stronger or milder resiliency for wall pressure-is produced, sothat aS the ring wears'away in use and opens out, a tight joint will bemaintained against the cylinder wall.

In the drawing A indicates the usual body portion of a ring having ends2 and 3,which are adjacent to each other. Each of these ends is formedwith a forwardly projecting side tongue 4. and a laterally projectingshoulder 5 forming a side groove, said tongue being cut awaylongitudinally on its under or inner edge'and said shoulder and groovebeing formed by a portion of the end of the ring being cut away alongthe side of the tongue. The adjacent ends of the ring are similarlyconstructed each having a side Patented Sept. 16, 1919.

tongue and an adjacent side groove, the

tongue in one member entering the groove in the opposite member. Thegrooves and tongues in the opposite members are of sufficient depth toproduce side seating surfaces 6 for the tongues, which will preventleakage of compressed liquid past the ring when the latter is in use. Itwill be observed that the ends of the seating surfaces are of enlargedarea, so that the ring can expand and contract without opening andleaking.

In producing the ring it is formed in a lurality of longitudinal partswelded toget ier, the drawing indicating for illustration the part 7welded to the remaining portion to enable eflicient machining ofinter-locking ends with the overlapping joint as long as desired. Theadjacent ends of the interlocking machined parts are scarfed at 8 toreceive welding. The plurality of parts machined and welded togetherthen will form the ring, with the overlapping joint as long asdesirable. Thus the surfaces can be finished to produce an absolutelyleak proof joint. Preferably the ring in normal position has sufiicientopening between its ends, so that sufficient expansion of the ring isprovided to produce a tight fit in the cylinder' with which the ring isemployed. While a specific construction of joint has been described, itwill be understood that the production of the ring by welding aplurality of longitudinal parts together can be employed with anyconstruction of joint desired wherein the ends overlap or do notoverlap. It will further be understood that by welding the partstogether as described a much stronger, more eflicient and simplerstructure is produced than. if the ring were constructed by riveting orbolting a plurality of longitudinal parts together. I have found inpractice that a successful ring with an interlocking leak proof jointcannot be produced without constructing the ring in a lurality of partsand machinlngthe over ap ping ends before said parts' are joinedtogether to complete the ring.

In accordance with the patent statutes, I have described the principlesof operation of my invention, together with the apparatus which I nowconsider to represent the best embodiment thereof, but I desire to haveit understood that the construction shown is only illustrative, and thatthe invention can be carried out by other means and applied to usesother than those above set forth within the scope of the followingclaims.

Having described my invention, what I claim as new and desire to protectby Letters Patent is:

1. The herein described method of making piston rings which consists intaking a metal ring, removing a segment therefrom, taking a segment ofthe same radius as said ring, forming an overlapped joint betweenadjacent ends of said ring portion and segment,

and rigidly connecting the other ends of said ring portion nd segment tocomplete said 2% The herein described method of making piston ringswhich consists in takinga metal ring, removing a segment therefrom,taking a segment of substantially the same radius as said ring, formingan overlapped joint between adjacent ends of said ring portion andsegment, scarfing the other ends of said ring portion and segment andflowing molten metal into the joint between the scarfed ends to completesaid ring.

3. The herein described method of making one piece piston rings, whichconsists in taking segments machined to a substantially uniform radius,forming an overlapping joint between adjacent ends of said segments, as

sembling said segments end to end with their end surfaces abutting andthe portions constituting said overlapping joint in'juxtaposition andfinally rigidly uniting said end surfaces to complete a ring.

In testimony whereof, I have signed my name to this specification.

JOHN J. RICHTER.

